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Chemistry One Liners | SSC CGL

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Chemistry One Liners | SSC CGL

shape Introduction

Chemistry is involved with elements and compounds composed of atoms, molecules, and ions. It is a branch of science that involves the study of the composition, structure and properties of matter. SSC Complete Study Material on “Chemistry One Liners” is the comprehensive collections of important topics which represent an unprecedented level of coverage of the Chemistry and will be helpful in the preparation of SSC and all other Competitive exams.

shape One Liners

SSC CGL Chemistry - Points:
  • Anthracite coal produces most heat per unit.

  • Wet wood will become use less soon after exposing in the open air.

  • Baryllium sulphate is less soluble in water due to high inflammable energy.

  • Cement is made hard with dehydration.

  • Energy is always released when a chemical bond is formed.

  • Maximum iron ore is found in Fe[latex]_{2}[/latex]O[latex]_{3}[/latex] state.

  • "All the four quantum numbers of two electrons in an atom are not the same" it is the law of Exclusion principle of pauli.

  • Sodium Benzoate is used for preservation of food grains.

  • Commercial nitric acid is coloured because it contains dissolved Nitrous oxide.

  • Fertiliser having high nitrogen content is Urea.

  • Success Tip: Chemical Formula CH[latex]_{4}[/latex]N[latex]_{2}[/latex]O.

  • The three elements most needed in common fertilizers are Nitrogen, Potassium and Phosphorous.

  • The oxygen that keeps us alive come from carbon dioxide.

  • Success Tip: CO[latex]_{2}[/latex] -> C + O[latex]_{2}[/latex]

  • Carbon dioxide gases is present under pressure in soft drinks.

  • Type metal does not expand ongoing from liquid state to solid state.

  • Boyle’s law holds good for any gas at low line temperature and high pressure.

  • The chemical that is used in making artificial rain is silver nitrate.

  • Uranium is commonly used in nuclear for producing electricity by nuclear fission.

  • Table salt gets moist during the rainy season because sodium chloride contains hygroscopic impurities like magnesium chloride.
SSC CGL Chemistry - Points:

  • Graphite is used as a lubricant in heavy machines.

  • The plastic material commonly used for making gear wheels is Polystyrene.

  • The anode in a dry cell consists of cadmium.

  • Sodium iodide is used to iodise common salt.

  • “Curie” is a unit of Radioactivity.

  • The enzyme that converts glucose to ethyl alcohol is Maltase.

  • J. Robert Oppen Heimer had developed Hydrogen Bomb.

  • The source of the sun’s energy is the process of thermionic emission.

  • Nitric acid is the acid used in lead storage cells.

  • Electron microscope was introduced by Knoll and Ruska.

  • Success Tip : In 1931

  • A gas thermometer is more sensitive than a liquid thermometer because gas expands more than a liquid.

  • Crooks glass is used for sunglasses.

  • ‘Milk of Magnesia’ is a suspension of magnesium hydroxide.

  • Galvanised iron is made by coating iron with Zinc.

  • Heat from Sun reaches the Earth by radiation.

  • Methane is abundant in Gobar gas.

  • Most suitable vessel for storing concentrated sulphuric acid is Glass Vessel.

  • Amylase was the first enzyme isolated in pure crystalline form.

  • Oxygen is the element that is in the highest percentage in the composition of earth.
SSC CGL Chemistry - Points:

  • When two ice cubes are pressed over each other they unite to form one cube, because of Hydrogen bond formation.

  • The advantage of detergents over soap is Detergents give lather even with hard water.

  • The fundamental particles present in the nucleus of an atom are Proton and Neutron.

  • Bleaching action of moist sulphur dioxide is because of its oxidising property.

  • H[latex]_{2}[/latex] gases will effuse out of Football Bladder most quickly.

  • Caesium is one of the alkali metals has the highest specific heat.

  • In Diamond substance, all carbon atoms are quaternary in nature.

  • Aniline Blue is a natural dye.

  • It is a soluble dye used as a biological dye

  • An electrostatic precipitator is used to control the pollution of thermal.

  • Diamond is harder than graphite because of tetrahedral structure of diamond.

  • The ratio of pure gold in 18-carat gold is 75%.

  • Gobar gas contains mainly Methane.

  • Zirconium is a non-radioactive element.

  • The gas used for artificial fruit ripening of green fruit is Acetylene.

  • Silicon is the element required for solar energy conversion.

  • The chemical name for ‘baking Soda’ is Sodium Bicarbonate.

  • Saccharin is made up of Toluene.

  • PVC is obtained by the polymerization of vinyl chloride.

  • Potassium permanganate is used for purifying drinking water, because it is an oxidsing agent.
SSC CGL Chemistry - Points:

  • Estrogen is female sex hormone.

  • The energy emitted by the Sun is due to Nuclear Fusion.

  • Nuclear fusion is a reaction in which two or more atomic nuclei come close enough to form one or more different atomic nuclei and subatomic particles (neutrons and/or protons).

  • Generally, emerald found is of Deep Green colour.

  • Adrenaline chemicals is a neurotransmitter substance.

  • Cloud is a colloidal dispersion of water drops in dispersion medium of air.

  • Conversion of chemical energy into electrical energy occurs in battery.

  • Paraffin wax is the petroleum wax.

  • Paraffin wax is a white or colourless soft solid derivable from petroleum, coal or oil shale, that consists of a mixture of hydrocarbon molecules containing between twenty and forty carbon atoms.

  • Purest form of iron is wrought iron.

  • Mercury forms an amalgam with other metals.

  • Glass is a super cooled liquid.

  • An oxalic acid solution is used to remove rust stains on cloth.

  • Chloroprene is Tear gas. Formula: C[latex]_{4}[/latex]H[latex]_{5}[/latex]Cl.

  • Hydrogen peroxide is used to restore the colour of old oil paintings.

  • Sodium chloride is commonly used as an antiseptic in mouth wash and toothpaste.

  • Milk is a natural emulsion.

  • A polymeric substance used to make parachute is Viscose.

  • Drinking Soda is acidic.

  • The cathode of a lead storage battery is made up of lead.
SSC CGL Chemistry - Points:

  • The highest percentage of iron content is found in Magnetite.

  • Pasteurisation of milk means heating of milk to above 62°C.

  • The surface temperature of Sun is estimated as 6000 degree centigrade.

  • Respiration is oxidation. Hydrogen Spectrum was first explained by Niels Bohr.

  • Magnetism in materials is due to circular motion of electrons.

  • Aluminium can be purified by electrolysis.

  • Type metal used in printing press is an alloy of lead and antimony.

  • Sour taste of coca cola is due to presence of acetic acid.

  • Bhopal gas tragedy is associated with methyl isocyanate.

  • Methyl isocyanate is an intermediate chemical in the production of carbamate pesticides. It has also been used in the production of rubbers and adhesives. As a highly toxic and irritating material, it is extremely hazardous to human health.

  • The acid rain destroys vegetation because it contains sulphuric acid.

  • Nuclear reactors used to produce electricity are based on nuclear fission.

  • Both fission and fusion are nuclear reactions that produce energy, but the applications are not the same. Fission is the splitting of a heavy, unstable nucleus into two lighter nuclei, and fusion is the process where two light nuclei combine together releasing vast amounts of energy.

  • The substance most commonly used as food preservative is acetic acid.

  • Catalyst is a substance which does not take part in the reaction as a reactant. It is not changed by the reaction or used up during the reaction. It is still there in the same form when the reaction is complete.

  • Carbon monoxide is the most toxic gas.

  • Skin of the human body is the first most affected part by nuclear radiation.

  • Sulphuric acid is used in the lead storage cells.

  • Tincture iodine is a solution of potassium iodide.

  • Tincture of iodine or Iodine tincture is an antiseptic it is also called weak iodine solution.
SSC CGL Chemistry - Points:

  • ‘Plaster of Paris’ is made by partial dehydration of gypsum salt.

  • Water can be separated from alcohol water mixture by distillation.

  • Distillation is a process of separating the component or substances from a liquid mixture by selective evaporation and condensation.

  • Milk sugar is Lactose.

  • Polythene is the polymer of Ethylene.

  • Rayon is made from cellulose.

  • Rain water is considered as pure water.

  • Silver Bromide is used for making film for photography.

  • Common alum is used for settling muddy water.

  • Phenol is used in the plastic industry for manufacturing Bakelite.

  • The metal used to make lightening conductors is copper.

  • A substance which readily forms colloidal solution in contact with water is called Hydrophilic colloid.

  • Electron was discovered by Joseph Thomson.

  • Electron was discovered in 1897.

  • When formaldehyde and potassium hydroxide are heated we get ethyl formate.

  • The enzyme in whose presence glucose and fructose are converted into alcohol is zymase.

  • Using saw-dust, oxalic acid is manufactured.

  • Carbon dioxide is used as the fire extinguisher.

  • Bleaching powder is extensively used for sterilizing water.

  • Calcium Hypochlorite is marketed as chlorine powder or bleach powder for water treatment and as a bleaching agent.
SSC CGL Chemistry - Points:

  • Propane and Butane mixture of gases is mainly used as a liquid under pressure in LPG cylinder.

  • Sulphuric acid is used in the battery.

  • Molecular formula H[latex]_{2}[/latex]SO[latex]_{4}[/latex] and molecular weight 98.079 g/mol.

  • The major constituent of air is nitrogen.

  • Rusting of iron takes place due to oxidation.

  • The lustre of the metals is because of reflection of light due to the presence of free electrons.

  • German silver used for making utensils is an alloy of copper, zinc, nickel.

  • Aqua regia is used to dissolve noble metals.

  • Aqua regia is a very strong acid. It is made by mixing one part nitric acid and three parts hydrochloric acid. The acid was named by alchemists because it can dissolve the noble metals gold and platinum.

  • Gunpowder was invented by Roger Bacon.

  • The purity of gold is expressed in carats. The purest form of gold is 24 carats.

  • Petroleum consists of a mixture of Hydrocarbons.

  • Otto Hahn is famous for the invention of Atom Bomb.

  • An emulsion is a colloid of a liquid in a liquid.

  • Percentage of carbon in steel ranges from 0.1 to 1.5.

  • Copper, Nickel and Zinc are present in German-silver.

  • The major harmful gas emitted by automobile vehicles which causes air pollution is Carbon Monoxide.

  • The chemical name of Common salt is Sodium chloride.

  • Denatured spirit is ethanol mixed with Water.

  • The most abundant inert gas in the atmosphere is Argon.
SSC CGL Chemistry - Points:

  • Magnesium is extracted from seawater.

  • Percentage of lead in lead pencils is 0.

  • The gas used in the artificial ripening of fruit is Acetylene.

  • Ruby and sapphire are oxides of aluminium.

  • The isotope of uranium used in atomic reactors is U[latex]_{235}[/latex].

  • In the process of magnetization of a bar, the entire bulk of the bar gets magnetised.

  • Cadmium is not a radioactive element.

  • The candle is a mixture of Paraffin wax and stearic acid.

  • Ethanol containing 5% water is known as rectified spirit.

  • Brass is an alloy of copper and zinc.

  • Roentgen had discovered X-rays.

  • The important ore of aluminium is bauxite.

  • Aqua regia is a 1 : 3 mixture, by volume, of conc.nitric acid and conc. hydrochloric acid.

  • The strongest force in nature is Nuclear force.

  • Atomic power plant works on the principle of fission.

  • Zinc sulphate is commonly used as Fungicide.

  • Aspirin is chemically known as Acetylsalicylic acid.

  • The wax used for making a candle is chemically a mixture of Aliphatic and aromatic hydrocarbons.

  • Litmus is obtained from Lichen.

  • Vinegar made by fermentation from cane sugar contains Acetic acid.
SSC CGL Chemistry - Points:

  • Photo-oxidation process is initiated by Light.

  • Limestone is used in large quantities in the Cement Industry.

  • The amount of chlorine available in water after disinfection is called Residual chlorine.

  • Carbon monoxide and benzene are the major pollutants of cigarette smoke.

  • Nuclear energy is a mineral based energy source.

  • It is derived from Uranium, Thorium and Plutonium.

  • Major gaseous pollutant of the thermal power station is SO[latex]_{2}[/latex].

  • The National Chemical Laboratory (India) is located in Pune.

  • Commercially, sodium bicarbonate is known as Baking soda.

  • An emulsifier is an agent which stabilises an emulsion.

  • Mortar is a mixture of water, sand and slaked lime.

  • The tip of the match-stick contains Red phosphorus.

  • The process of removing calcium and magnesium from hard water is known as Water softening.

  • Column A (Product) Column B (Source)
    Formic acid Ants
    Citric acid Lemon
    Tartaric acid Tamarind

  • Aspirin is common name of Acetyl Salicylic Acid.

  • Carbon monoxide is an inflammable gas, Hydrogen is also inflammable.

  • Cadmiumdoes do not react with water to produce Hydrogen.

  • Ozone consists of Oxygen only.

  • Petrolhas the least density among Freshwater, Saltwater, Petrol and Mercury.

  • One of the constituents of tear gas is Chloropicrin.
SSC CGL Chemistry - Points:

  • An atomic clock is based on transitions in Caesium.

  • Chemical name of vinegar is Acetic acid.

  • Properties of heavy water-
      • i. Density of heavy water is higher than that of ordinary water. ii. The freezing point of heavy water is higher than that of ordinary water. iii. It produces corrosion.

  • Silver halides are used in photographic plates because they are Soluble in hypo solution.

  • Tetra Ethyl Lead (TEL) is an antiknock compound.

  • Curie point is the temperature at which Transmutation of metal occurs.

  • The isotope used for the production of atomic energy is U-235.

  • Electron is not a nucleon.

  • The material used in the manufacture of the lead pencil is Graphite.

  • Cement was discovered by Joseph Aspdin.

  • German silver, an alloy, does not contain the metal Silver.

  • Sulfur is added to make natural rubber more strong and bouncy.

  • Detergents are sodium salts of sulphonic acids.

  • The noble gas used in radiotherapy is radon.

  • Steel contains 0.1-2 % carbon.

  • The chemical most commonly used for cloud seeding or ‘artificial rainmaking is Silver Iodide'.

  • The substance that is added to make natural rubber strong and more bouncy is sulphur.

  • White phosphorus is always kept under water.

  • White Phosphorous is a very reactive non-metal. If exposed to air it catches fire quickly.

  • Desalination is a process that removes dissolved minerals from seawater, brackish water, or treated wastewater.
SSC CGL Chemistry - Points:

  • Galena is a mineral of Lead.

  • Magnalium is an alloy of Aluminium and Magnesium.

  • Galvanization of Iron is carried out using Zinc.

  • Country which launched the world’s first satellite dedicated to monitoring Green House Gas emission is Japan.

  • Cokking gas is a mixture of butane and propane.

  • Dry powder fire extinguishers contain sand and sodium bicarbonate.

  • Quartz glass is used for making glass reinforced plastic.

  • Two elements which are used to absorb neutrons to control the chain reaction during nuclear fission are Boron and Cadmium.

  • The most commonly used chemicals in the artificial rainmaking or cloud seeding are Silver Iodide(Agl).

  • Chocolates can be bad for health because of a high content of Nickel.

  • Boron can be used to absorb neutrons to control the chain reaction during nuclear fission.

  • Hydrogen bomb is based on the principle of uncontrolled fusion reaction.

  • Supersonic jet causes pollution by thinning of Ozone layer.

  • OTEC stands for Ocean Thermal Energy Conversion.

  • Fission reaction produces the most harmful radiation.

  • Fibre glass is used for making glass reinforced plastic.

  • Cadmium causes Rai-Rai disease.

  • Glycol is added to aviation gasoline because it prevents freezing of petrol.

  • Lens is made up of a Flint glass.

  • The element which is used for vulcanizing rubber is Sulphur.
SSC CGL Chemistry - Points:

  • Borax is responsible for the extra strength of Pyrex glass.

  • The noble gas used for the treatment of cancer is Radon.

  • Vasundhara Summit was held in Brazil.

  • Liquid Hydrogen + Liquid Oxygen could be used as fuel in propellant or rockets.

  • The addition of gypsum to Portland cement helps in preventing rapid setting of cement.

  • Indoform is used as an antiseptic.

  • The constituent of automobile exhaust that can cause cancer is Lead.

  • The optimum dissolved oxygen level (in mg/litre) required for survival of aquatic organisms is 4-6.

  • Hard steel contains 0.5 to 1.5 per cent carbon.

  • Cement is formed by strongly heating a mixture of Limestone and Clay.

  • The temperature of oxy-acetylene flame is around 3200 degree C.

  • The refrigerant ‘FREON’ is Difluoro Dichloro Methane.

  • They are stable, nonflammable, moderately toxic gases or liquids which have typically been used as refrigerants and as aerosol propellants.

  • A balloon filled with helium rises in air because helium is less dense than air.

  • Cooking oil is converted into vegetable ghee by the process of Hydrogenation.

  • Rusting of iron requires Oxygen and water.

  • Uranium eventually decays into a stable isotope of Lead.

  • Chromium one of the toxic heavy metals is found in modern tannery industries.

  • High octane fuel contains high content of lead.

  • Stainless steel is an alloy of chromium, carbon and iron.
SSC CGL Chemistry - Points:

  • Amount of water vapour in the atmosphere is measured in terms of Humidity.

  • Raw materials used for the manufacture of glass are sand, sulphur, soda.

  • Aluminium powder is used in welding broken pieces of iron rails and machine parts.

  • The product used for manufacturing of Industrial alcohol is Molasses.

  • All beverage alcohol and much of that used in industry is formed through fermentation of a variety of products including grain such as corn, potato mashes, fruit juices, and beet and cane sugar molasses.

  • Pure water is bad conductor of electricity because it is feebly ionized.

  • In Pure form of water there are no ions.

  • The metals commonly used for electroplating are Chromium, Copper and Nickel.

  • Among the metals most commonly used for plating are zinc, nickel, chromium, cadmium, copper, silver and gold.

  • Polycyclic hydrocarbons, automobile exhaust can cause cancer.

  • The U.S. Department of Health and Human Services states that some Polycyclic hydrocarbons may be carcinogens in humans and animals and can cause harmful effects on skin and the auto-immune system.

  • Bleaching powder is used in drinking water as a disinfectant.

  • Calcium hypochlorite is used for the disinfection of drinking water or swimming water.

  • James Simpson Invented chloroform as anaesthetic.

  • Nuclear fusion is the process of production of energy in the Sun.

  • Nuclear fusion is the process by which two or more atomic nuclei join together, or “fuse” to form a single heavier nucleus.

  • The iron ore which contains 72% of iron is magnetite.

  • The filament of electric bulb is made up of Tungsten.

  • Cement is usually a mixture of Calcium silicate and calcium aluminate.

  • The atmospheric gas that is mainly responsible for Green House effect Carbondioxide.
SSC CGL Chemistry - Points:

  • Electric bulbs are filled with argon.

  • The purest form of iron is Cast Iron.

  • The gas that is used in the manufacture of vanaspati ghee is Hydrogen.

  • A bioenergy source obtained by fermentation to supplement fossil fuel petrol is Ethanol.

  • The substance that cause the worst air pollution is Sulphur dioxide.

  • The reaction is fast, this statement is not correct regarding covalent compounds.

  • The properties of a mixture are the same as those of its components.

  • PVC is obtained by the polymerization of Vinyl chloride.

  • Enriched uranium used in a nuclear reactor is uranium with a high percentage of a particular isotope.

  • In a refrigerator, cooling is produced by the evaporation of a volatile liquid.

  • Match the following : Alloy

      • Bronze Copper, tin
      Brass Copper, zinc
      German Silver Copper, zinc, nickel
      Type metal Composition Lead, antimony, tin

  • It is not advisable to sleep under a tree at night because of the release of carbon dioxide.

  • Match the following:

      • Copper sulphate Fungicide
      Penicillin Antibiotic
      Urea Insecticide
      Malathion Fertiliser

  • Heavy water implies deuterated water.

  • Fly ash is the environmental pollutant generated by Thermal power plant.

  • Water hyacinth has been found useful to check water pollution caused by Industrial affluents.

  • The high boiling point of water compared to hydrogen sulphide or hydrogen chloride is due to Hydrogen bonding.

  • Number of electrons determines the chemical properties of an element.
SSC CGL Chemistry - Points:

  • Darkening property of photo chromatic glass is due to the presence of silver chloride.

  • Photochromic glasses are optical glasses that darken on exposure to specific types of light of sufficient intensity, most commonly ultraviolet (UV) radiation.

  • In the absence of activating light the lenses return to their clear state.

  • Supersonic aircrafts discharge NO[latex]_{2}[/latex] into the stratosphere.

  • Chemical nature of laughing gas is Nitrous oxide.

  • It is an oxide of nitrogen. At room temperature, it is a colourless, odourless non-flammable gas, with a slightly sweet taste. It is used in surgery and dentistry for its anaesthetic and analgesic effects.

  • The difference between isotopes of an element is due to the presence of a different number of neutrons.

  • The increasing abundance of greenhouse gases in the atmosphere has led to Global warming, Depletion of ozone layer in the stratosphere and Carbon dioxide fertilisation effect.

  • Hydrogen fuels causes minimum environmental pollution.

  • Minamata epidemic that caused several deaths in Japan in 1965 occurred due to pollution in water by Mercury.

  • Ozone affects human health by causing severe pulmonary edema at a concentration of 9.0 ppm.

  • Chlorination is adding small amounts of chloride to contaminated water.

  • Water chlorination is the process of adding chlorine or hypochlorite to water. This method is used to kill certain bacteria and other microbes in tap water as chlorine is highly toxic. In particular, chlorination is used to prevent the spread of waterborne diseases such as cholera, dysentery, typhoid etc.

  • The substance that causes the worst air pollution is carbon monoxide.

  • Carbon monoxide is produced from the partial oxidation of carbon-containing compounds, it forms when there is not enough oxygen to produce carbon dioxide (CO[latex]_{2}[/latex]), such as when operating a stove or an internal combustion engine in an enclosed space.

  • ‘Milk of magnesia’ is a suspension of Magnesium hydroxide.

  • Magnesium hydroxide powder is used industrially as to neutralize acidic wastewaters.

  • Pik globosa is used as biofilter in cleaning pollution of water by Cadmium.

  • Chemical name of Plaster of Paris is Calcium sulphate hemihydrates.

  • Gypsum is a crystalline mineral of hydrated calcium sulphate (chemical formula CaSO[latex]_{4}[/latex].2H[latex]_{2}[/latex]O). Gypsum is colourless or white, is not highly water-soluble and is not at all hard.
SSC CGL Chemistry - Points:

  • Acidity of rain is measured by pH meter.

  • Carbohydrates are compounds of Carbon, oxygen and hydrogen.

  • Correct statements are:
      • i. Phenols are acidic ii. In benzene all the atoms lie in one plane iii. Dilute solutions contain less amount of solute iv. Pyroligneous acid obtained from wood contains 10% Acetic acid

  • Pyroligneous acid, also called wood vinegar or wood acid, is a dark liquid produced by the destructive distillation of wood and other plant materials.

  • Union Carbide India Ltd. man ufactured essentially Petrochemicals.

  • Amides can be converted to amines by the reaction named Claisen.

  • The base used as an antacid is Magnesium hydroxide.

  • Denatured alcohol is unfit for drinking as it contains poisonous substances.

  • Phenolics as pollutants can be removed from waste water by use of Polymeric adsorbents.

  • Dry Ice is nothing but Solid carbon dioxide.

  • Dry ice is the solid form of carbon dioxide. It is used primarily as a cooling agent.

  • Calcium Silicate is obtained as slag in a blast furnace.

  • When H[latex]_{2}[/latex] gas is allowed to expand from a region of high pressure to a region of low pressure, the temperature of the gas increases.

  • In the industrial production of vegetable ghee, the process involved is reduction.

  • In 1986 the Chernobyl Nuclear Power Plant of the former USSR had accident that caused escape of radio nuclides into atmosphere.

  • When dust gets into the eye, the part that becomes inflamed and pink is the Sclerotic.

  • Chromium salt is used as a mordant in dyeing.

  • Green house effect in the environment is due to the increase of Carbon dioxide.

  • ‘Eutrophication’ is associated with Nitrates and Phosphates.

  • Eutrophication is almost always induced by the discharge of phosphate containing detergents, fertilizers, or sewage, into an aquatic system.
SSC CGL Chemistry - Points:

  • A reduction reaction involves addition of hydrogen.

  • An antiknock for petrol is Lead tetraethyl.

  • An antiknock agent is a gasoline additive used to reduce engine knocking and increase the fuel’s octane rating. Gasoline is a fuel mixture. High compression internal combustion engines place gasoline under great pressure.

  • Oxygen is colourless.

  • Lactose is present in milk.

  • Hard water and soft water can be distinguished by using detergent.

  • Hydrogen fuels causes minimum environmental pollution.

  • Hydrogen fuel is a zero-emission fuel when burned with oxygen.

  • Ferrous sulphate is used in water treatment as a coagulant aid.

  • Hardness of the water is commonly measured in terms of calcium carbonate equivalents.

  • Nitrous oxide is known as laughing gas.

  • Ti metals is used in Space Crafts to withstand high temperatures.

  • Brass gets discoloured in air due to constant exposure in presence of Hydrogen sulphide.

  • Thinner particles responsible for deteriorating the air-quality resulting in the damage of vital body organs are referred as PM 2.5.

  • The pollutants which move downward with percolating ground water are called Leachates.

  • Leachate is the liquid that drains or ‘leaches’ from a landfill. It varies widely in composition regarding the age of the landfill and the type of waste that it contains. It usually contains both dissolved and suspended material.

  • Emulsification is breaking fats into small globules.

  • Rutherford’s scattering experiment proved the presence of nucleus in atoms.

  • When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy slate, they emit light, which we can observe in Emission spectra.

  • Trie concept of “Green House Gases” was postulated by Joseph Furier.
SSC CGL Chemistry - Points:

  • “Bhopal gas tragedy” 1984 is related to Methyl isocyanate.

  • The nuclear particle having no mass and no charge, but only spin is neutrino.

  • In a period from Li to F, ionisation potential cannot be predicted.

  • Iron can deposit copper from copper sulphate solution.

  • Helium is used to dilute oxygen in the gas cylinders used by divers.

  • Sulphur, Chlorine and Nitrogen etc form oxyacid.

  • Exposure to mixtures of chemicals is greater than expected on the basis of effects of exposure to each chemical individually. This is known as Synergism.

  • Neutrons are slowed down in a nuclear reactor by Moderator.

  • In nuclear engineering, a neutron moderator is a medium that reduces the speed of fast neutrons, thereby turning them into thermal neutrons capable of sustaining a nuclear chain reaction.

  • An element of atomic no. 29 belongs to d-block.

  • H[latex]_{2}[/latex]SO[latex]_{4}[/latex] is used as a catalyst in the production of high octane fuels.

  • The term reactor referred to in waste water treatment is Aeration tank.

  • The effect or response produced by two or more chemicals are less than the sum of the effects or response that the chemical would produce individually is known as Antagonism.

  • Threshold limit value of copper in the atmospheric air is 1.0 mg/[latex]{m}^{3}[/latex].

  • The threshold limit value (TLV) of a chemical substance is a level to which it is believed a worker can be exposed day after day for a working lifetime without adverse effects.

  • Alpha particle is the nucleus of an atom of Helium.

  • Silicone is a polymer of Dialkyl dichloro silane.

  • Blood is a natural colloid.

  • German Silver does not contain Silver.

  • German silver contains copper, from 50% to 61.6%; zinc, from 19% to 17.2%; nickel, from 30% to 21.1%.
SSC CGL Chemistry - Points:

  • The presence of Cobalt in Vitamin B[latex]_{12}[/latex] was established for the first time by Spectroscopy.

  • Coating of solid waste with impervious material is known as Encapsulation.

  • An aerosol is a colloidal system of a solid dispersed in a gas.

  • Food cans are coated with Tin and not Zinc because Zinc is more reactive than Tin.

  • Biogas produced by the fermentation of animal dung, human sewage or crop residues in an airtight container is rich in Methane.

  • PYROLYSIS is a process for solid waste treatment:
      • i. It converts the waste into solid, liquid and gas of which the resultant liquid and gas can be used to produce energy. ii. The process occurs under high pressure at temperature above 430° C. iii. It is a thermochemical decomposition of organic waste.

  • The heaviest naturally occurring element is Uranium.

  • Sulphur dioxide bleaches colouring matter by Reduction.

  • Radium, Plutonium and Uranium are radio-active elements.

  • All elements with atomic numbers greater than 83 are radioactive. Naturally occurring radioactive elements include radium, thorium, and uranium.

  • Gypsum is used for improvement of Saline soils.

  • In the nuclear reactors, moderators are used to Slow down the neutrons.

  • Endosulfan spray on cashew crop resulted in the pollution to the tune of tragedy in Kerala.

  • Endosulfan became a highly controversial agrichemical due to its acute toxicity, potential for bioaccumulation, and role as an endocrine disruptor. Because of its threats to human health and the environment, a global ban on the manufacture and use of endosulfan was negotiated under the Stockholm Convention in April 2011.

  • The percentage of nitrogen present in ammonium sulphate is 27%.

  • Ethanol containing 5% water is known as Rectified spirit.

  • Trans boundary pollution acid rain is caused by Nitrogen oxide and sulphur dioxide.

  • Stains of rust on clothes can be removed by Oxalic acid.

  • Neutron has greatest mass among electron, proton, neutron and hydrogen nucleus.

  • A colloidal system in which a liquid is dispersed in a liquid is called emulsion.
SSC CGL Chemistry - Points:

  • The antiseptic compound present in dettol is Enloroxylenol.

  • Piped Natural Gas (PNG) is used for Cooking.

  • The percentage of carbon in cost iron is 3 to 5.

  • Coupling and repulsion are the two states of linkage.

  • The freezing point of fresh water is 0°C.

  • The compound that has the least value for octane number is n-heptane.

  • The pair of compounds used as anaesthetic in medicines Nitrous oxide, Chloroform.

  • pH scale ranges from 0–14.

  • A real gas can act as an ideal gas in low pressure and high temperature.

  • Iron rusts quickly in Sea water.

  • Aerated water contains CO[latex]_{2}[/latex] .

  • Magnetite is Fe[latex]_{3}[/latex]O[latex]_{4}[/latex] .

  • The plants which grow well, only in light are known as Heliophytes.

  • Heliophytes are adapted to a habitat with a very intensive insolation, because of the construction of its own structure and maintenance (metabolism).

  • Iron is prevented from rusting by coating with zinc. This process is called as Galvanisation.

  • The study of Drugs and their action is known as Pharmacology.

  • When cathode rays strike a target of high atomic weight, they give rise to X-rays.

  • The major use of sulphur is in the manufacture of H[latex]_{2}[/latex]SO[latex]_{4}[/latex] .

  • Atoms of different elements have different atomic number and different number of valence electrons.

  • Organic compounds are covalent compounds.
SSC CGL Chemistry - Points:

  • The ‘Greenhouse effect’ is mainly due to increase in atmospheric Carbon dioxide.

  • 2, 4-D is used as Weedidde.

  • Among Fluorine, Lithium, Oxygen and Zinc, Lithium exhibits the greatest tendency to lose electrons.

  • Poison used for killing rats is Zinc phosphide (Zn[latex]_{3}[/latex] P[latex]_{2}[/latex]).

  • Antacid tablets consist of hydroxides of magnesium and aluminium.

  • The element absorbed both in cation and anion form is Nitrogen.

  • Nucleons are regarded as composites sub-particles known as quarks.

  • Radioactive element Radium was discovered by Marie Curie.

  • Water vapour, O[latex]_{3}[/latex] and CO[latex]_{2}[/latex] are greenhouse gases.

  • Interveinal necrotic spots on leaves appear due to SO[latex]_{2}[/latex] injury.

  • Nuclear fallout contains Alpha particles and a-particles.

  • The pollutant responsible for ozone holes is CFC.

  • A chlorofluorocarbon (CFC) is an organic compound that contains only carbon, chlorine, and fluorine, produced as volatile derivative of methane, ethane, and propane. They are also commonly known by the DuPont brand name Freon. The most common representative is dichlorodifluoromethane. Many CFCs have been widely used as refrigerants, propellants (in aerosol applications), and solvents.

  • The alkoloid naturally found in coffee, cocoa and cola nut is Caffeine.

  • The metal used for making air-crafts and rockets is Nickel.

  • The process of improving the quality of rubber by heating it with sulphur is called Vulcanization.

  • Vulcanisation is a chemical process for converting natural rubber or related polymers into more durable materials by the addition of sulphur or other equivalent curatives or accelerators.

  • Helium, Neon and Argon are Noble gases.

  • The noble gases make a group of chemical elements with similar properties, under standard conditions, they are all odourless, colourless, monatomic gases with very low chemical reactivity. The six noble gases that occur naturally are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and the radioactive radon (Rn).

  • Sodium is very reactive and kept in kerosene.
SSC CGL Chemistry - Points:

  • In the periodic table of elements, on moving from left to right across a period, the atomic radius decreases .

  • Vulcanized rubber contains sulphur 3-5%.

  • Uric acid is the chief nitrogenous wastes in Birds.

  • Galena is a metallic ore.

  • It is the most important ore of lead and an important source of silver.

  • The moderator used in a nuclear reactor is ordinary water.

  • Commonly used moderators include regular (light) water (roughly 75% of the world’s reactors), solid graphite (20% of reactors) and heavy water (5% of reactors). Beryllium has also been used in some experimental types, and hydrocarbons have been suggested as another possibility.

  • The chemical name of ‘Plaster of Paris' commonly used for setting broken bones is calcium sulphate.

  • The apparatus used to test acidity of aqueous solution is pH meter.

  • The total energy of an electron inside an atom is less than zero.

  • The rusting of metal iron in air needs both Oxygen and moisture.

  • Arsenic problem in India is primarily due to overexploitation of ground water in the affected areas.

  • Acid rain is caused by SO[latex]_{2}[/latex] and NO[latex]_{2}[/latex].

  • Acid rain is caused by emissions of sulphur dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to produce acids.

  • Graphite is used in pencils.

  • The branch of medicine involving synthetic chemical compounds is Allopathy.

  • Hydrogen was discovered by Cavendish.

  • Peroxyacetyl nitrate is a secondary pollutant.

  • Peroxyacetyl nitrate is a peroxyacyl nitrate. It is a secondary pollutant present in photochemical smog. It is thermally unstable and decomposes into peroxyethanoyl radicals and nitrogen dioxide gas. It is a lachrymatory substance.

  • The term ‘brown air’ is used for Photochemical smog.
SSC CGL Chemistry - Points:

  • There is a violent explosion when a drop of glycerol is added to crushed KMNO[latex]_{4}[/latex], spread on a paper.

  • Most commonly used bleaching agent is Chlorine.

  • The least penetrating power ray is a - Ray.

  • Hydrogen peroxide is an effective sterilizing agent. Water results when it readily loses active oxygen.

  • The ore of Aluminium is Bauxite.

  • The usual aluminium ore is bauxite. Bauxite is essentially an impure aluminium oxide. The major impurities include iron oxides, silicon dioxide and titanium dioxide.

  • Waksman got the Nobel Prize for the discovery of Streptomycin.

  • Streptomycin is an antibiotic used to treat a number of bacterial infections. This includes tuberculosis, Mycobacterium avium complex, endocarditis, brucellosis, Burkholderia infection, plague, tularemia, and rat bite fever.

  • Heavy metals got their name because compared to other atoms they have higher atomic masses.

  • Photo chemical smog is a resultant of the reaction among NO[latex]_{2}[/latex], O[latex]_{3}[/latex] and peroxy acetyl nitrate in the presence of Sunlight.

  • When a helium atom loses an electron it becomes a positive helium ion.

  • The soft silvery metallic element which ionizes easily when heated or exposed to light and is present in atomic clocks is Cesium.

  • Caesium is a chemical element with symbol Cs and atomic number 55. It is a soft, silvery-gold alkali metal with a melting point of 28.5°C, which makes it one of only five elemental metals that are liquid at or near room temperature.

  • Catalytic converters are generally made from transition metals.

  • The green colour seen in firework displays is due to the chloride salt of Barium.

  • The radiation that can penetrate deepest in our body Gamma-particles.

  • X-rays are neutral particles.

  • Water flows off the wings of birds and insects due to the presence of waxes.

  • Lactic acid is associated with muscle fatigue.

  • An important green-house gas other than methane being produced from the agricultural fields is Nitrous oxide.
SSC CGL Chemistry - Points:

  • Acid rain is caused due to pollution of atmosphere by oxides of nitrogen and sulphur.

  • Chlorofluorocarbons are responsible for depletion of ozone layer in the atmosphere.

  • Sulphur dioxide (SO[latex]_{2}[/latex]) and Nitrogen oxides (NOX) are the components responsible for acid rain.

  • Hydrated Aluminosilicate is Zeolite.

  • Highest source of air pollution in the world is automobiles.

  • LPG is mostly liquefied butane.

  • Lead is used in the storage batteries.

  • The biogas used for cooking is a mixture of methane & carbon dioxide.

  • Carbon gives hardness to stainless steel.

  • Zinc sulphate, Potassium sulphate and Sodium sulphate are soluble in water.

  • Activated Charcoal is used to remove colouring matter from pure substances by Adsorption.

  • Chernobyl disaster is the result of pollution by radioactive waste.

  • Thorium caused radioactive pollution along the coast of Kerala.

  • Magnesium is a constituent metal of Chlorophyll molecule.

  • Chlorine gas used in preparation of bleaching powder.

  • The depletion in Ozone layer is caused by Chlorofluorocarbons.

  • Phosphorus is kept in water because its ignition temperature is very low.

  • The commonly used coolant in refrigerators is Freon.

  • Trinitrotoluene is used as an explosive.

  • Conversion of ammonia to nitrites is known as nitrification.
SSC CGL Chemistry - Points:

  • Aluminium is not a donor atom.

  • The oxygen liberated during photosynthesis comes from water.

  • The term ‘Higgs Boson’ is associated with God Particle.

  • Besides CO[latex]_{2}[/latex], the other green house gas is CH[latex]_{4}[/latex].

  • Arsenic problem in India is primarily due to overexploitation of ground water in the affected areas.

  • At low temperature, lead behaves as a super conductor.

  • Starch is a natural polymer.

  • Sulphur shows allotropy in the liquid state.

  • Nitrogenous fertilizers are ammonium sulphate, Urea and ammonium nitrate.

  • When iron rusts, its weight increases.

  • Organism, responsible for alcohol fermentation is yeast.

  • When sodium bicarbonate is heated strongly, sodium carbonate is formed.

  • waste water is water released from kitchen.

  • Anthracite is the most pure form of carbon among anthracite, lampblack, graphite and wood charcoal.

  • Anthracite is the most metamorphosed type of coal in which the carbon content is between 92.1% and 98%.

  • Silver gets corroded due to presence of hydrogen sulphide in air.

  • Uranium is a radioactive element.

  • Silica gel is a drying agent.

  • Bio fertilizers convert nitrogen to ammonia.

  • One of the best solutions to get rid of non-biodegradable waste is recycling.
SSC CGL Chemistry - Points:

  • Warming ammonium chloride with sodium hydrochloride in a test tube is an example of open system.

  • All isotopes of the same element have the same atomic but different atomic masses.

  • Nitric acid does not react with gold.

  • Calcium salts used as fertilizer is calcium sulphate.

  • Formic acid is produced by red ants.

  • The most reactive phosphorous is white phosphorous.

  • In arc welding, Argon is used because of its low reactivity with the metal.

  • Inert gases are chemically un-reactive.

  • Chemical name of vinegar is acetic acid.

  • Causes of mottling of the dental enamel is high levels of fluorides in the water.

  • Gold is the heaviest metal among gold, silver, iron and copper.

  • NO[latex]_{2}[/latex] is used as anesthetics.

  • Potassium Permanganate is used for purifying drinking water, because It is an oxidising agent.

  • Spraying of DDT on crops causes pollution of Soil & Water.

  • Atoms of same element having different mass numbers are called Isotopes.

  • The outer most layer of Sun is known as Corona.

  • Chemical composition of cement is limestone, clay and Gypsum.

  • The chemical that is used to ripen mangoes is calcium carbide.

  • Calcium carbide is a chemical compound with the chemical formula of CaC[latex]_{2}[/latex]. Its main use industrially is in the production of acetylene and calcium cyanamide.

  • Nylon threads are made of polyamide polymer.
SSC CGL Chemistry - Points:

  • The compound used in prickly-heat powder to prevent excessive sweating is boric acid.

  • The manufacturing of iron from iron ore involves the process of reduction.

  • An emulsion is a colloidal solution of liquid in liquid.

  • Sludge is a by-product of sewage treatment and can be decomposed to produce bio-gas.

  • Graphite is a good electric conductor among graphite, diamond, peat and charcoal.

  • Iron and manganese present as pollutants in water cannot be removed by chlorination.

  • The antiparticle of an electron is positron.

  • Synthetic detergents are prepared from hydrocarbons of petroleum.

  • Limestone is a raw material used by Cement industry.

  • Atomic number of an atom gives the number of protons.

  • Chemical properties of isotopes must be same.

  • Glycol is used to manufacture terylene.

  • During fermentation of sugar, the compound which is always formed is Ethyl Alcohol.

  • Removal of carbon particles from air involves the principle of electrophoresis.

  • Hydrogen Peroxide is commonly used for pulp bleaching in the paper industry.

  • The molecular mass of a gas is twice its vapour pressure.

  • Brown stains in vessels and clothes indicates the presence of high quantities of manganese in water.

  • At room temperature, the metal that remains liquid is Mercury.

  • Phenol is known as carbolic acid.

  • Atomic explosion is triggered by uncontrolled chain reaction.
SSC CGL Chemistry - Points:

  • Teflon is used as non stick coating for cooking utensils.

  • During a nuclear fusion, two light nuclei combine to form a heavy nucleus.

  • Nitrous oxide is known as “Laughing Gas”.

  • The ‘solid waste’ is also known as sludge.

  • Alcohol is more volatile than water because its boiling point is lower than water.

  • The method will be employed to test the hardness of water is formation of leather with soap.

  • Copper is not an alloy.

  • Bronze is an alloy of Copper and Tin.

  • Pure water has pH value 7.

  • Acid used in Lead storage battery is sulphuric acid.

  • Heavy water is manufactured at Trombay.

  • Two electrons in an orbital are differentiated by spin quantum number.

  • The Solar energy produced by fusion reaction.

  • Ozone layer is formed due to reactions of Oxygen and Ultraviolet rays.

  • Aldehydes are strong reducing agents.

  • The subatomic particle that does not have any electric charge is a neutron.

  • Argon gas is used in bulb.

  • Chlorine gas is a major component of tear gas.

  • Brine solution is excess salt + water.

  • pH scale ranges from 0 to 14.
SSC CGL Chemistry - Points:

  • Glass, cement and steel are not pure elements whereas sodium is a pure element.

  • A pure element means a substance whose atoms all (or in practice almost all) have the same atomic number, or number of protons.

  • Sodium bicarbonate is chemical name of baking soda.

  • Atomic mass number is determined by adding number of protons and neutrons.

  • The ‘Periodic Law’ was given by Dmitri Mendeleev.

  • Silicon is used in Solar Panels, ICs and optical glass but it is not used in ink pen.

  • Boron is used as control rod in Atomic reactor.

  • Nitro Glycerol is used for the preparation of dynamite.

  • Nitrogen dioxide is added to commercial nitric acid to make it coloured.

  • Carbon dioxide is used in fire extinguisher.

  • Water is used as coolant in Atomic reactor.

  • Osmium is the heaviest metal among iron, silver and nickel.

  • The examples of sublimation are dry ice and camphor.

  • Sublimation is the phase transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase.

  • The CFL Lamp primarily causes Mercury Pollution.

  • Substances and their nature.

      • Nature Substance
      Acidic Carbonated drink
      Basic Basic
      Neutral Distill water

  • The nature of thorium is radioactive.

  • Uranium is used as fuel rods in Atomic reactor.

  • Bleaching action of chlorine is due to oxidation.
SSC CGL Chemistry - Points:

  • Ethylene is used for ripening of fruits.

  • Rock Salt contains sodium.

  • The transition metals are actinium, bohrium and osmium whereas radium is not a transition metal.

  • SPM stands for Suspended Particulate Matter and COD stands for Chemical Oxygen Demand.

  • Suspended particulate matter (SPM) is finely divided solids or liquids that may be dispersed through the air from combustion processes, industrial activities or natural sources.

  • Glass is non-biodegradable whereas cotton and paper is biodegradable.

  • ‘Electron’ was discovered by J. J. Thomson.

  • The characteristics of the solid are high density, regular shape and high rigidity.

  • The components of an atom are Protons and Neutrons.

  • In Aqua Regia, HCl and HNO[latex]_{3}[/latex] are mixed in ratio of 1:3.

  • The mass of one mole of a substance in grams is called Molecular Mass.

  • Nitrogen, Potassium and Phosphorus are commonly found in most fertilizers.

  • Graphite is used as moderator in atomic reactor.

  • ‘Oil of vitriol’ is the common name of Sulphuric Acid.

  • Hydrochloric Acid is also known as ‘Muriatic Acid’.

  • Vermicompost is an organic fertilizer.

  • Organic fertilizers are fertilizers derived from animal matter, animal excreta, human excreta, and vegetable matter. Naturally occurring organic fertilizers include animal wastes from meat processing, peat, manure, slurry, and guano.

  • Cotton cloth will readily catch fire.

  • The main components of stainless steel are iron are chromium and nickel.

  • Lithium has the lowest density.
SSC CGL Chemistry - Points:

  • The chemical name of vinegar is Acetic Acid.

  • The common name of Calcium Hypochlorite is bleaching powder.

  • Mercury has least melting point.

  • Mercury has a freezing point of -38.83 °C and a boiling point of 356.73 °C, both the lowest of any metal.

  • ‘Rn’ is chemical symbol of radon.

  • Spinach contains Oxalic Acid.

  • Iodine ion is a negatively charged ion but calcium ion, zinc ion and silver ion are positively charged ion.

  • Positive ions, or cations, are formed by the loss of electrons; negative ions, or anions, are formed by the gain of electrons. An atom that has either lost or gained one or more electrons, so that it has an electrical charge. Ions can be either positively or negatively charged.

  • The common name of sodium carbonate is washing soda.

  • Potassium is most reactive in nature.

  • The chemical symbol of ‘Iron’ is Fe.

  • Atomic Number is denoted by Z.

  • Washing soda is chemically called as sodium carbonate.

  • ‘Cations’ are formed by the removal of electron.

  • Tartaric Acid is found in tamarind, grapes and unripe mangoes but it is not found in spinach.

  • Tartaric acid is a white crystalline organic acid that occurs naturally in many plants, most notably in grapes. Its salt, potassium bitartrate, commonly known as cream of tartar, develops naturally in the process of winemaking.

  • The chemical name of quick lime is calcium oxide.

  • The common name of CaOCl[latex]_{2}[/latex] is bleaching powder.

  • In a periodic table, while moving from left to right in a period, number of shells remains same.

  • The properties of a metal are hardness, lustrous, malleability and good conductivity of heat.
SSC CGL Chemistry - Points:

  • The nature of antacid is basic.

  • An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element.

  • ‘Anions’ are formed by the addition of electron.

  • Anions are atoms or radicals (groups of atoms), that have gained electrons. Since they now have more electrons than protons, anions have a negative charge. For example, Chloride ions Cl-, Bromide Br-, Iodide I-.

  • Rusting is redox reaction (oxidation and reduction).

  • Aluminium ion, copper ion and zinc ion is the cation.

  • A cation is a positively-charged ion.

  • Zinc is used for galvanization.

  • Galvanization is the process of applying a protective zinc coating to steel or iron, to prevent rusting.
  • Dry ice is solid carbon dioxide.

  • Oxide of magnesium will turn red litmus blue.

  • Gas is highly compressible.

  • PET is a very familiar form of polyester. It is used for making bottles.

  • Polyethylene terephthalate commonly abbreviated PET, PETE is the most common thermoplastic polymer resin of the polyester family and is used in fibres for clothing, containers for liquids and foods, thermoforming for manufacturing.

  • Carbon dioxide is heavier than oxygen.

  • Formic acid is released when an ant bite.

  • Cadmium is responsible for Itai-Itai disease.

  • Itai-Itai disease was caused by cadmium poisoning due to mining in Toyama Prefecture.

  • Pure water freezes at the temperature of 32 Fahrenheit.

  • Process of gaining electron is known as reduction.
SSC CGL Chemistry - Points:

  • Tungsten (W) is generally used for making filaments of bulb.

  • Isobars are elements with different atomic number but same mass number.

  • Metals and their related ores.

      • Metals Ores
      Iron Haematite
      Copper Chalcopyrite
      Thorium Monazite

  • The weakest bond in nature is hydrogen bond.

  • Acid + Base -> Salt + Water.

  • A radio-active substance has a half life of six months. Three-fourth of the substance will decay in twelve months.

  • An example of Inert Gas is argon.

  • An inert gas is a gas that has extremely low reactivity with other substances. The noble gases—helium, argon, neon, xenon, krypton, radon, and element 118 (Uuo)—exist in their elemental form and are found in Group 18 of the periodic table.

  • Process of loosing electrons is known as oxidation.

  • Anions are formed by gaining of electrons.

  • Anions are atoms or radicals (groups of atoms), that have gained electrons. Since they now have more electrons than protons, anions have a negative charge.

  • The chemical formula for Sodium Chloride (salt) is NaCl.

  • Yellow color is obtained from a mixture of red and green.

  • Methyl isocyanate was released during Bhopal gas tragedy.

  • Nature of pH of Milk is Slightly Acidic. Milk has a pH of around 6.5 to 6.7.

  • The examples of emulsion are Chocolate-Milk, Butter and Whipped Cream.

  • Potassium Nitrate is used commercially in the industry of Fire Cracker Manufacturing.

  • The examples of Allotrope are diamond, graphite and ozone.

  • Allotrope is each of two or more different physical forms in which an element can exist. Graphite, charcoal, and diamond are all allotropes of carbon.
SSC CGL Chemistry - Points:

  • The common name of CaOCl[latex]_{2}[/latex] is Bleaching Powder.

  • The common characteristic of the elements of the same group in the periodic table is electrons in outer most shell.

  • Dermatitis is caused by Nickel.

  • Dermatitis, also known as eczema is a group of diseases that results in inflammation of the skin.

  • Cyan colour is mixture of Blue and Green.

  • The main components of Brass Alloy are Copper and Zinc.

  • An ore of iron is Siderite.

  • Gold, Silver and Aluminium can be beaten into Sheets but Potassium cannot be beaten into Sheets.

  • The process of conversion of solid state directly to gaseous state called is sublimation.

  • The main components of Bronze Alloy are copper and tin.

  • Coal Combustion Power Plant causes fly ash.

  • A chemical formula of quicklime is CaO.

  • Supercooling is cooling of liquid below freezing point.

  • Phenol is also known as Carbolic Acid.

  • Most liquids that conduct electricity are solutions of acids, bases and salts.

  • Magnesium hydroxide base is present in milk of magnesia.

  • The process of rust forming on iron is called Rusting.

  • The name of the acid in an ant’s sting is formic acid.

  • Sodium hydroxide base is present in soap.

  • Metals react with sodium hydroxide to produce hydrogen gas.
SSC CGL Chemistry - Points:

  • Calcium hydroxide base is present in lime water.

  • Magnesium (Mg) + Oxygen (O[latex]_{2}[/latex]) = MgO.

  • The reaction between an acid and a base is called neutralisation.

  • Proton was discovered by Ernest Rutherford.

  • In an acid base reaction water is produced along with a salt.

  • The process of melting is also called fusion.

  • The name of the acid in grapes is tartaric acid.

  • Magnesium oxide (MgO) + Water (H[latex]_{2}[/latex]O)= [Mg(OH)[latex]_{2}[/latex]].

  • Fire extinguishers emit carbon dioxide gas.

  • Ash is formed when Magnesium is burnt.

  • Photon was discovered by Albert Einstein.

  • A change in which no new substances are formed is called Physical Change.

  • The property of metal by which it can be drawn into wires is called ductility.

  • A change in which a substance undergoes a change in its physical properties is called Physical Change.

  • The process of depositing a layer of zinc on iron is called galvanisation.

  • Salt is obtained by evaporation of sea.

  • The passage of an electric current through a conducting liquid causes Chemical Reaction.

  • Blue Vitriol is another name of Copper Sulphate.

  • The rubbing surface of a matchbox has powdered glass and a little red phosphorus.

  • Acetic Acid is another name of vinegar.
SSC CGL Chemistry - Points:

  • The reaction of Copper Sulphate and Iron produces Iron Sulphate and Copper.

  • The process of depositing a layer of any desired material by means of electricity is called electroplating.

  • Crystallisation is an example of Physical Change.

  • Crystallisation is also a chemical solid–liquid separation technique, in which mass transfer of a solute from the liquid solution to a pure solid crystalline phase occurs.

  • Vinegar and Baking Soda together produce Carbon Dioxide.

  • Neon was discovered by Morris W. Travers and William Ramsay.

  • A change in which one or more new substances are formed is called Chemical Change.

  • The property of metals by which they can be beaten into thin sheets is called malleability.

  • Fabric made from polyester does not get wrinkled easily.

  • Calcium Carbonate is formed when Carbon Di-oxide is passed through Lime Water.

  • Chemical formula for sulphurous acid is H[latex]_{2}[/latex]SO[latex]_{3}[/latex].

  • The temperature at which a solid melts to become a liquid at the atmospheric pressure is called its melting point.

  • Stainless Steel is made by mixing iron with carbon and metals like chromium, nickel and manganese.

  • The melting point of ice is 273.16 K.

  • Brownish film formed on iron when left in open is called rust.

  • The substances which have very low ignition temperature and can easily catch fire with a flame are called inflammable substances.

  • In the modern periodic table metals, metalloids and non metals are found in p-block.

  • Cinnabar is ore of Mercury.

  • Mass of a hydrogen atom is 1837 time the mass of an electron.

  • Polycot, polywool and terrycot are fabrics that may contain polyester.
SSC CGL Chemistry - Points:

  • Ca(OH)[latex]_{2}[/latex] is slaked lime.

  • Respiration is exothermic process.

  • The term exothermic process describes a process or reaction that releases energy from the system to its surroundings, usually in the form of heat, but also in a form of light, electricity (e.g. a battery), or sound (e.g. explosion heard when burning hydrogen).

  • In Modern Periodic Table, while moving left to right across a period, the metallic character decreases.

  • 2 moles are present in 36 gm of water.

  • Real gas can work as an ideal gas under low pressure and high temperature condition.

  • Bronze is made of essentially copper and tin.

  • Incomplete combustion of a fuel gives poisonous carbon monoxide gas.

  • Mercury remains in liquid form at room temperature.

  • Aqua Regia is a mixture of concentrated hydrochloric acid and concentrated nitric acid.

  • The mass of 4 mole of aluminum atoms is 108 grams.

  • Alpha particles were made to fall on a thin gold foil by Ernest Rutherford.

  • Mercury is a base metal of amalgam alloy.

  • The structure of graphite is hexagonal.

  • If A wooden spoon is dipped in a cup of ice cream, Its other end will not become cold.

  • Tartaric acid is the most abundant acid found in grapes.

  • In a reaction, the loss of hydrogen by substance is called as oxidation.

  • Metal oxides are said to be basic oxides.

  • All acids have similar chemical properties.

  • Cheese is an example of colloidal solution of liquid in solid.

  • Hydrogen chloride is diatomic.

  • Ionic compounds have high melting and boiling points.

  • Carbon compounds are poor conductor of electricity.
SSC CGL Chemistry - Points:

  • Carbon compounds have low melting and boiling point.

  • Seven (7) hydrogen atoms are present in chloropropane.

  • To neutralize too acidic soil, both quick and slaked lime is used.

  • Carbon, chromium, nickel and manganese elements are present in stainless steel.

  • Ammonia, hydrogen sulphide and carbon monoxide are inorganic gas whereas methane is an organic gas.

  • The examples of exothermic reaction are:
      • i. burning of natural gas ii. respiration iii. the decomposition of vegetable matter into compost

  • Silver chloride, silver bromide and silver iodide are used in black and white photography.

  • Boron shows exception to the Octet rule.

  • Suspension is a heterogeneous mixture.

  • Galvanisation method is used to protect iron from rusting.

  • Brass is an alloy of copper and zinc metals.

  • Rayon is obtained from wood pulp.

  • Fuel, air and heat are requirements for producing fire.

  • Solder is an alloy of lead and tin.

  • Iron rusts because of redox reaction.

  • A single product is formed from two or more reactants in combination chemical reaction.

  • Formic acid is found in ant’s sting.

  • When a substance loses oxygen during a reaction, it is called reduction.

  • Lime stone, chalk and marble are the form of calcium carbonate but lime water is a form of calcium hydroxide.

  • Nitrogen is most electronegative among Arsenic, Nitrogen and Phosphorus.

  • 7.0 is value of pH of a neutral solution.

  • Sodium hydroxide base is generally found in soaps.
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